graphics: add opt-in ZMask support and launcher rendering options

src/common/emulatorConfig.h

@@ -86,6 +86,7 @@ struct ConfigOptions {
 	bool                   renderdoc_enabled           = false;
 	bool                   readback_linear_images      = false;
 	bool                   sync_raw_image_buffers      = false;
+	bool                   support_zmask               = false;
 	bool                   tessellation_enabled        = false;
 	bool                   trophy_enabled              = true;
 	uint32_t               trophy_duration_seconds     = 6;
@@ -151,6 +152,7 @@ bool GpuAssistedValidationEnabled();
 bool RenderDocEnabled();
 bool ReadbackLinearImagesEnabled();
 bool SyncRawImageBuffersEnabled();
+bool SupportZmaskEnabled();
 bool TessellationEnabled();
 bool TrophyEnabled();
 uint32_t GetTrophyDurationSeconds();